Kissimmee is the largest city and the county seat of Osceola County in Florida, United States. According to the 2020 census, the city had a population of 79,226. It serves as a principal city within the Orlando-Kissimmee-Sanford, Florida, Metropolitan Statistical Area.
The Census Bureau identifies Kissimmee as the principal city of an urban area that is distinct from the Orlando urban area. Additionally, it is a primary component of the Kissimmee–St. Cloud, Florida urban area, which recorded a population of 418,404 in 2020, ranking as the 100th largest urban area in the United States.